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2 Sheets -Sheet 1.

J. M. CLARK.

4 'Mill Bolt. No. 20,327. 4 Patented May 25, 1858.

UNITED STATES, PATENT OFFICE.

JAS. M. CLARK, OF LANCASTER, PENNSYLVANIA.

FLOURING-MILL.

Specification of Letters Patent No. 20,327, dated May 25, 1858.

To all whom it may concern:

Be it known that I, JAMES M. CLARK, of Clarks Villa, Lancaster city and county, and State of Pennsylvania, have invented certain new and useful Improvements in F louring-VIills; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings and to the letters of reference marked thereon.

The nature of my invention consists in certain improvements in the bolting apparatus to flouring mills, the peculiarities of which will be hereinafter described.

In order that others skilled in the arts may use and manufacture my invention I will proceed to describe its operation and construction.

In the accompanying drawings which make a part of this specification Figure l is a side elevation showing the relative p0sition of the two bolts. Fig. 2 is a front side elevation showing the position of the conveyers, slide, and the mill connection. Fig. 3 is an end view. Fig. 4 is a section of the duster and a portion of the bolt.

In Fig. 1 A is the bolt for the finest quality of flour; A is the lower bolt and is in tended for bolting the lower grades of flour, shorts and shipstutf. A is a duster attached to the lower bolt for the purpose of dusting the bran and detaching from it any portion of flour which may remain in it after passing through the bolts. E, are scrapers on the bolting reel for the purpose of scraping up the fiour from the circular bottom. B, is a short conveyer case, D is a short conveyer, carrying the material from the elevators G into the upper bolt A, said conveyer being formed on the shape of the bolt A. D, is a short conveyer formed on the shaft of the bolting reel; this conveyer is incased in a case (B) a section of which is seen in this figurethis case is secured at its outer extremity to the head block C, its inner extremity being within the bolt A. The shaft of the bolt A, on which conveyer D is formed has its bearing in the head block ((1') as will be seen and may be lowered or elevated by means of said head block. When the bolt A turns on its shaft the conveyer D, must also turn and convey the material into the bolt. H, H, are the two heads of the mill which are made of cast iron, or of other suitable material.

G" is an elevator into which the ground material passes after coming from the stones and before entering the bolt A. C, is a crank for operating a screw marked (0) said screw (0) serving to elevate or lower the head block (0) in which the shaft of the bolt has its bearing, thus lowering or elevating one end of the bolt A, and giving t more or less pitch as may be desired. F, is a hand wheel for operating the screw (f) which passes into the head block (g) said head block forming a bearing for the end of the lower boltv shaft; thus the lower bolt is given the desired pitch. i) are set screws for stationing the head block (g) at any desired point. a. is a band which operates the brushes in the duster A. d, is aspout for conducting the coarser material from the bolt A, into the conveyer case (0) and by means of conveyer K into the bolt A. m, n, 0, p, r, are pinions for driving the different portions of the machinery as will be described. g is a shaft marked the same in Fig. 2 and shows the means of conveying power from the mill to the bolting apparatus.

Q Q, are the circular bottoms of the bolting chest, under the two bolting vats, on which the flour falls after passing through the cloth. L

In Fig. 2, H, H, are the heads of the bolting chest and are made of cast iron or other material. G and G are the two elevators at the ends of the bolting chest. A is the upper bolt, for bolting the finest quality of flour. S, S, are draw braces, within the bolting reel passing from one end to the other and through the arms S S, of the reel as seen in this figure. r, r, r, 1', are nuts, on the ends of these braces for the purpose of lightening them and thus straightening the reel when it swags, or warps, and, also staying it to prevent swagging. F, F, are scrapers on the bolting reel, A. for the purpose of scraping up the flour as it falls upon the circular bottom Q. of the bolting chest, into the conveyer C. C is a conveyer for the purpose of conveying the finest quality of the flour out at the sliding spouts, Z Z Z or into other channels for either rebolting or regrinding as may be desired, 72 h h" h are slide valves in the bottom of conveyer C, when open allowing the material to pass through into spouts, Z Z Z, or, into conveyer D, or, in other directions as will be described. Z, Z, Z, are sliding spouts having a rest attached to their back and by means of this rest sliding on the conveyer or case D, or its equivalent and against the side of the circular bolting chest of the lower bolt, to any desired point under the apertures in conveyer C. D, is a conveyer, which carries material which I do not wish to return to the stonest-hus rejecting any portion of the coarser material which would injure the flour by being reground, and returning the best portions of the material for regrinding and rebolting. j, j, j, j, j, are slide valves over the conveyer E. When these slide valves are shut the bolted material from the lower bolt after falling on the circular bottom of the bolting chest, is scraped up and passes into the conveyer D. If these slides 7', j, 7 7", 7 are open, the material passes into the lower conveyer E and is carried back into elevators G, and returned thus to the superfine bolt. E, is a conveyer for carrying the ground material from the stone to the elevators G, and

- thence through conveyer B, into the super fine bolt. K, is a stationary chute or spout under the lower bolt for the purpose of carrying off the ship stuff as it falls from the bolt. B, is a short conveyer, which serves to carry the material when ground from the elevators G, into the superfine bolt, A. V, is a pulley on the shaft of conveyer C, and 00 is a pulley on the shaft of the lower bolt A Fig. 1 02, being a belt passing around these two pulleys and connecting them. a, b, 0, (Z, c, are spur wheels conveying motion to the bolts, conveyers, and elevators. 7", is a spout connecting conveyer case D and elevators G. a, is a spout leading from elevators Gyto the eye of mill stones and is for the purpose of conducting the material back which is to be reground.

In Fig. 8 H, represents a head, or end, of

the bolting chest, which may be made of cast iron or other material. A, represents the superfine bolting reel and cloth; a are scrapers on the reel of this bolt running from one end of the bolt to the other. Q is the circular bottom of the bolting chest which is attached to one side of the bolting chestand has an opening immediately over the conveyer M, on the other side its entire length; M, is the conveyer for the super- T, is an aperture in the bottom of conveyer case M, 2', is an aperture in the side of the conveyer case. O, is a slide valve which has an aperture in it marked at, said aperture serving a double purposewhen said slide 0, is in the position it occupies in full lme, aperture T is closed, and apertures z, and w are open, and thus form a com- 7 A the duster.

munication between conveyer M, and the circular bottom Q of the lower bolting chest and the material passing through 2', and or, falls on the bottom Q and is carried up to aperture R, and thrown into conveyer K, by means of the scrapers, on the arms of the reel marlged u, or if desired up to aperture S and into conveyer L.

When the slide valve'O, occupies the position seen in dotted line 2', is closed and 00, being under T, the material passes through the apertures T, and a1, and either falls into conveyer case L, or if sliding spout h is adjusted under these apertures as seen, it falls into the spout, and is carried out into receptacles outside of the bolt. N, represents a series of slide valves, running from one end of the bolting chest to the other which serves to close the apertures S. L is a conveyer for carrying any portion of the material back to the stones, for regrinding. S, is an aperture admitting when open any portion of the material which may be desired, for regrinding, that has passed, when any of this series of valves may be open through the lower bolt. P, is a slide valve, or series of valves, running from one end of the chest to the other. R, is an aperture over conveyer K and allows any portion of the material which it is desired to rebolt to enter conveyer K. K, is the conveyer for carrying the ground materialfrom the stones to the bolt. Q is the circular bottom of the lower bolting chest. In Fig. 4 A, is the bolt, C, is the shaft of the bolt, and D is the shaft of the duster, being hollow and passing over the bolt shaft. F, are the brushes of the duster and F are the arms connecting the brushes to the shaft D. B, is the band which passes over the pulley on the duster shaft and gives it motion in the opposite direction to the bolt.

In the operation of my invention the material after being ground at the stones passes down at the spout 16, seen Fig. 2 and into conveyer E, and is carried by conveyer E into the elevators G and up elevators G into the short conveyer case B, and through conveyer case B by conveyer D, into the superfine bolt A. As the material passes down this bolt A, the double extra, the extra and superfine flour passes through the bolt, and falls upon the circular bottom of the bolting chest Q, seen in Fig. 3; the coarser material passes on to the end of the bolt A, and down through the spout a seen Fig. 1 into short conveyor case e, and is carried by conveyer K of that figure into the lower bolt A the fine fiour, the middlings, the shorts and the ship stuff pass through this bolt,

and fall on the circular bottom Q seen Fig.

3, while the bran passes into the duster A, Fig. 1 where it is cleansed of all the fine flour,'it then passes out of the bolt, through an aperture in the end of the bolt into receptacles outside, the fine flour falling onto bottom Q, Fig. 3 and is carried into conveyer K Fig. 3 and is returned to the bolt for rebolting and refining or otherwise as the operator may desire.

The material after passing through the bolt may be made to take various directions as the operator may desire. \Vhen the finest quality of flour passes through the bolt A, and falls upon the bottom Q it is carried into conv-eyer case M, by means of scrapers 'lt. From this conveyer M, it may take several directions. If the operator wishes to draw it oi'i, the sliding spout ii, is stationed as seen in Fig. 3, and the aperture :1; being drawn to correspond with aperture T, the fiour passes out spout 71 into receptacles for it. If it is desirable to regrind this super fine flour spout it may be removed, while the slide 0 remains as above, unchanged, and the flour will fall into conveyer L and be carried back to the stones again-if it is desirable to rebolt this superfine fiour the slide vale 0, may be pushed in, thus opening aperture z, and giving aperture w a different position. The flour will then pass through i, (I being closed) and through aperture :0 down to the bottom Q, the aperture R being open it will be scraped by scrapers it into conveyer K, and thus be returned to the superfine bolt, with the other ground material. Thus all or any portion of the double extra and superfine flour may be drawn ofi or it may be reground, or it may be rebolted as the operator may desire.

When the coarser material passes from bolt A, down spout d, Fig. 1, it enters conveyer K, and is carried into bolt A, where all except the bran passes through bolt A, and falls upon the bottom Q, Fig. 3. From this bottom it is scraped by the scrapers u on the arms of the bolting reel. If it is wished to regrind and then rebolt, this material or any part thereof, slide valve P, is made to close aperture It, and the material is then scraped up to aperture S, which being open for this operation it enters conveyer L, and is thus carried to spout f, Fig. 2, down spout f, into elevator G, up elevator G, into spout n, and down spout 'n, to the eye of the stones where it is reground and returned to the bolt, through conveyer E, Fig. 2. If it is desired to rebolt this material without regrinding slide valve P, Fig. 3, is drawn back, and aperture K left open the material then falls into conveyer K of that figure and is carried up elevators G, and into the refining bolt, A, Fig. 1. The bran passes down bolt A, Fig. 1, and into the duster A, this duster revolving very rapidly in a different direction from that of the bolt dusts all of the fine flour out which clings to it or remains among it, it then passes through the gauze wire of the duster and is scraped up by scrapers E, from the bottom Q], Fig. 3, and carried into the conveyer K, while the bran is carried out at the end of the bolting chest, into any receptacles for it.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is- 1. I claim the arrangement of the apertures T, and i, in the conveyer case M, Fig. 3, with the slide valve 0, constructed and operated as set forth.

2. I claim the combination of a movable or stationary conveyer, with, and formed on the shaft of the bolting reel for the purpose of conveying the material into the bolt to any required distance to ettect the object herein fully specified.

JAMES M. CLARK.

Witnesses C. M. ALEXANDER, CHARLES ALEXANDER. 

